bool isPalindrome(string some_string) {
    if (some_string.length() == 0 || some_string.length() == 1) {
        return true;
    }

    if (some_string[0] == some_string[some_string.length() - 1]) {
        return isPalindrome(some_string.substr(1, some_string.length() - 1));
    }

    else {
        return false;
    }
}

First off, this code is to check if a string is palindrome or not. I looked up some links and thought I could use substr to get the characters after the first index and before the last character index, what am I doing wrong? This is my first time here so I’m sorry if this question was not well initiated.